﻿// FluentViewModel (http://fluentviewmodel.codeplex.com/)
//
// Copyright © 2010 Kialco Group 
//
// The contents of this file are subject to the Mozilla Public
// License Version 1.1 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy of
// the License at http://www.mozilla.org/MPL/
// 
// Software distributed under the License is distributed on an 
// "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
// implied. See the License for the specific language governing
// rights and limitations under the License.

using Castle.Core.Interceptor;

namespace FluentViewModel
{
    internal sealed class ViewModelInterceptor : IInterceptor
    {
        public void Intercept(IInvocation invocation)
        {
            var viewModel = invocation.Proxy as IViewModel;
            if (viewModel == null)
                return;
            var propertyName = invocation.Method.GetPropertyName();
            if (string.IsNullOrEmpty(propertyName))
                return;
            if (invocation.Method.IsSetter())
            {
                viewModel.PropertySet(propertyName, invocation.Arguments[0]);
            }
            if (invocation.Method.IsGetter())
            {
                invocation.ReturnValue = viewModel.PropertyGet(invocation.Method.ReturnType, propertyName);
            }
        }
    }
}